This page features a replica ostensibly of a Nulli Secundus, not a common one to forge.
For the record, it bears the serial number H27635. This is a valid Hetchins number, from 1959, however, the frame details in the ledger do not match what is presented.
Firstly, Hellenics were not introduced until the 1960s, so a 1959 frame with Hellenic stays would be an anachronism. Secondly, Hellenics were straight-stayed, not curly (with two exceptions -- this is not one of them).
Look closely at the brake bridge and its ornament: wrong ornament (at all, ever), anachronistic bridge for 1959.
Now look at the bb shell: we have seen this sort of butchery before: shims have been added to make pencil stays fit into a bb shell not made for pencil stays.
The join on the fork crown is also not right for a Hetchins (see marked area in cyan).
Finally, the brazing on the stay ends is not up to standard for a Hetchins.